This is awesome, thanks man! I’ve always been confused by turboprops where you see the exhaust right behind the propeller. Now I understand - reverse flow!
A benefit of it's reverse flow design is that Ice Vanes can be incorporated under the engine intake and ice chunks or other dense objects will not be able to "make the turn" up into the compressor.
Todo el secreto de un motor así está en la forma de los álabes de estatores y turbinas, en los materiales con los que están hechos y en la caja de reducción planetaria que aprovecha una muy alta velocidad de rotación de la turbina y la transforma en velocidades mucho más bajas con alto torque al eje!!!. Una maravilla tecnológica
How much additional thrust comes from the exhausts than the propellor? Could the exhaust gas not turn some smaller propellors to gain some extra thrust or generate some low end power for the plane. Since its a gas turbine and gas turbines can burn lots of fuel, can they operate different fuel types more efficiently.
it's worthy to note, although stators, according to this video, apparently do increase pressure, they also straighten the airflow, while simultaneously guiding the airflow in order to prevent a compressor stall. I said apparently because I haven't heard personally before that they increase pressure.
Neither have I, but it makes sense. The air after passing a compressor will be rotating somewhat with the direction of the shaft. By straightening the flow, you would essentially slow down the flow along that rotational axis, resulting in some increase in pressure.
How much thrust does the propeller itself generate in relation to the turbine? I still struggle to find an actual importance on the propeller. But I’m a newb.
....A turboshaft rotating a propeller, which provides virtually all of the engine's thrust. That's the same thing with larger turbofans for large airliners (Airbus / Boeing) . The engine core's (gas generator + free power turbines) main purpose is to drive the (enormous) fan ahead of the core that produces over 95 % of the engine,s thrust.
I think it has something to do with balance, to reduce engine torque. If everything is spinning in one direction the plane will essentially want to rotate around it in the opposite direction if that makes sense.
depends on the engine but a good average is about 16:1 with 35,000 down to 1900rpm though some its 20,000:2000 so 10:1 and some its 50000:1700 it all depends on the engine and application because different props can use the same engine and you're trying to govern that prop for its max efficiency a bigger prop needs to spin slower or the tips can begin to go super sonic which leads to sudden losses in thrust
I both flew PT6’s in Kingairs and maintained them too. There are things turboprops can do that jets cant. There is indeed a place for jets, turboprops and pistons.
@@craigg4246 strong thrust reversal is a neat trick it's just not worth it. the drawbacks with turboprops are far too great. Noise, space they take up and compromise the design, thrust asymmetry, ugliness, visibility and actually worse fuel economy ironically. Although some could be aerodynamics.
@ thrust reverse is only one of many. Sounds like you haven’t flown them? How about the ability to go down/slow down? Jets and pistons either can’t or struggle with that. Is easy for turboprops. I have been at 5000’ agl on a 2 mile final, and had to add power to make the runway. And been at 7,000’ agl abeam the numbers on downwind, again, had to add power to make the runway. Or being able to keep my speed up on approach to fit in with heavy jet traffic into big terminals, and then drop 60KIAS one mile from the FAF. Or operate out of short soft strips? Took the Kingair into a 2700’ strip. Don’t try that in the eclipse. Some missions are just better served by turboprops.
@ no, try to pay attention here. Sheeesh. You can lose 60 Knots in 1 mile. Not go 60 knots. Like reduce from 200 to 140. And having to add power, was just to illustrate how easy it was to descend rapidly. Have you ever flown a plane?
This is amazing! A picture is worth a thousand words, but a moving picture is worth, well... a whole lot more!
You mean like... 1300 words?
Actually writing a research paper about this
PT6As are basically turbo props and PT6Ts are turboshafts. Very well explained. I was a technical specialist in PWC.
Excellent presentation!
Excellent video - not pretentious - just solid science
JR
Reverse flow is due to the reversal in flow direction in the combustion chamber
Excellent! I am digging the explanations and the physics and engineering involved
...we used the PT6B on our Sikorsky S76B models...customers LOVED it!!!
Thank you for your excellent explanation. I am from Austria and can understand your English very well. Greetings from Austria
Austria! Cool! Hi from Canada.
I appreciate your video. In the next year I'll be purchasing a new TBM 940. This place uses this engine. Type 66D.
This is awesome, thanks man! I’ve always been confused by turboprops where you see the exhaust right behind the propeller. Now I understand - reverse flow!
woooord
You rock for making these! Thanks Mario!
thank you for the explanation.
I have a doubt, how could the airflow pass from centrifugal compressor to the chamber combustion?
Thank you Mario ! Best video on TH-cam explaining Turboprops.
Great video. The PT-6 is an elegantly designed engine. A good reliable design, with some neat oddities
A benefit of it's reverse flow design is that Ice Vanes can be incorporated under the engine intake and ice chunks or other dense objects will not be able to "make the turn" up into the compressor.
Reverse flow, is not about the intake air, its the gas in the combustion chamber which is reversed.
Best explanation I've seen, well articulated.
Amazing! Thanks Mario
What is the besic price of tarboshaft engine
Great explanation. What software do you use to illustrate these videos?
blender
come to think of it, you could actually make a reverse flow turbofan jet engine too to avoid the nested shafts... little ugly but just maybe
Are there any exotic materials inside the PT6 engine? Like Titanium or Inconel?
Todo el secreto de un motor así está en la forma de los álabes de estatores y turbinas, en los materiales con los que están hechos y en la caja de reducción planetaria que aprovecha una muy alta velocidad de rotación de la turbina y la transforma en velocidades mucho más bajas con alto torque al eje!!!. Una maravilla tecnológica
yeah, it is pretty amazing technology.
Amazing explanation. I completely understand how the thing works now. Who came up with this? XD
Great video, clear and straight to the point.
Thank you so much...❤️❤️ loved the video
How about a video on how the gearbox works!
How much actual pound thrust is given at the exhaust?.
In the PT6A-67B, which powers some of the PC-12 fleet, the figure is 175 pounds thrust from the exhaust.
This is a very amazing video,
Helped me in my pilot training!
Fabulous explanation
Fantastic video and description. Not only easy to understand but also complete and full of informations. Great job!
Thank you, that was an excellent explanatory video.
ABSOLUTELY BRILLIANT!
thankyou so much for this easier explanation !!
Thank you for your excellent. I am doing university research and I want to learn more Do you recommend a book on Turboprop
Very good work with this virtual teardown!
cool
How much additional thrust comes from the exhausts than the propellor? Could the exhaust gas not turn some smaller propellors to gain some extra thrust or generate some low end power for the plane. Since its a gas turbine and gas turbines can burn lots of fuel, can they operate different fuel types more efficiently.
on some planes like a king air it can be up several hundred pounds of additional thrust
Perfect explanations💯
I am wondering why the different rotation direction for rotor of compressor and free turbine? Btw, your videos are awesome, greetings from China
great lesson!
Very good explanation
Outstanding!!!!!
Great Video
great video
Great video! Thanks so much!
Great video.
it's worthy to note, although stators, according to this video, apparently do increase pressure, they also straighten the airflow, while simultaneously guiding the airflow in order to prevent a compressor stall. I said apparently because I haven't heard personally before that they increase pressure.
Neither have I, but it makes sense. The air after passing a compressor will be rotating somewhat with the direction of the shaft. By straightening the flow, you would essentially slow down the flow along that rotational axis, resulting in some increase in pressure.
@@米空軍パイロット Very true, because pressure and velocity are inverse with eachother.
How much thrust does the propeller itself generate in relation to the turbine? I still struggle to find an actual importance on the propeller. But I’m a newb.
The turbine doesn't generate thrust. It powers the propeller which generates thrust for the aircraft.
Amazing thank you for this !
very good
Thank you!
nice
Great video...
Thanks
Hello can we say that the PT6T-3 engine and the PT6A-67F engine are the same?
Not sure sorry
@@PilotEffect hello thanks for your reply, now i know the answer.
And they aren't equal, i changed e mails with Pratt &Whitney.
PT6T is a turboshaft engine and PT6A is a turboshaft.
Tsnkz sir more viboe,,,
Do you have a channel on telegram
no sorry
Whaaaaat
I never knew that, so turboprop is basically a jet engine spinning a propeller?? whaaaaaat
....A turboshaft rotating a propeller, which provides virtually all of the engine's thrust.
That's the same thing with larger turbofans for large airliners (Airbus / Boeing) . The engine core's (gas generator + free power turbines) main purpose is to drive the (enormous) fan ahead of the core that produces over 95 % of the engine,s thrust.
Amazed. Thanks
Good job!
Great vid. Thanks
PT = Popular Turboprop?
Thank you
you are the best
Thank you a lot
Awesome!
Damn this was good (and short)
Sir why rotation of power turbine and gas generator is in opposite direction
Please explain
I think it has something to do with balance, to reduce engine torque. If everything is spinning in one direction the plane will essentially want to rotate around it in the opposite direction if that makes sense.
ratio between drive shaft & propeller (amount of reduction)?
depends on the engine but a good average is about 16:1 with 35,000 down to 1900rpm though some its 20,000:2000 so 10:1 and some its 50000:1700 it all depends on the engine and application because different props can use the same engine and you're trying to govern that prop for its max efficiency a bigger prop needs to spin slower or the tips can begin to go super sonic which leads to sudden losses in thrust
Thanks
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
Hi
Hi
Eclipse 550 twin jet has better fuel economy than Baron 58 and Cessna 401 piston twins. Therefore turboprops should not exist.
I both flew PT6’s in Kingairs and maintained them too. There are things turboprops can do that jets cant. There is indeed a place for jets, turboprops and pistons.
@@craigg4246 strong thrust reversal is a neat trick it's just not worth it. the drawbacks with turboprops are far too great. Noise, space they take up and compromise the design, thrust asymmetry, ugliness, visibility and actually worse fuel economy ironically. Although some could be aerodynamics.
@ thrust reverse is only one of many. Sounds like you haven’t flown them? How about the ability to go down/slow down? Jets and pistons either can’t or struggle with that. Is easy for turboprops. I have been at 5000’ agl on a 2 mile final, and had to add power to make the runway. And been at 7,000’ agl abeam the numbers on downwind, again, had to add power to make the runway. Or being able to keep my speed up on approach to fit in with heavy jet traffic into big terminals, and then drop 60KIAS one mile from the FAF. Or operate out of short soft strips? Took the Kingair into a 2700’ strip. Don’t try that in the eclipse. Some missions are just better served by turboprops.
@@craigg4246 how is having to add thrust on approach in any way a quality? and 60knots is below stall speed of any turboprop. That's poor airmanship
@ no, try to pay attention here. Sheeesh. You can lose 60 Knots in 1 mile. Not go 60 knots. Like reduce from 200 to 140. And having to add power, was just to illustrate how easy it was to descend rapidly. Have you ever flown a plane?
F my profesor, this is all I needed
This comment made the whole yt channel worth the effort. Awesome. gg
a banana republic!
Canadian🇨🇦 engine
Turbulence
awesome videos
This is awesome! Thank you!
Thank you!